Diagnosis
A continuous loop is started by the parent ID, child ID or next ID forthe node with the ID &V1&. This means that the node refers indirectlyor directly to itself.
Example
The node ID and the parent ID are identical.

Procedure
Check the parent ID, child ID and next ID for the node whose IDs are inthe parent ID, child ID, or next ID for the node with the ID &V1&.
If this does not help, check the entire subtree of the parent node
with ID &V2& to see if it contains nodes in which either the ChildID
or the NextID are identical to &V1&.